That’s a 29% increase from the first nine months of 2011. Renewable energy sources now account for 14.9% (including hydro) of all installed U.S. electrical generating capacity. Excluding hydro, renewables now supply over 5% of US electricity.

EIA.govTotal generation from all sources. Click to embiggen.EIA.govTotal generation from renewables. Click to embiggen.

So if the United States is generating about 5 percent from renewables each month, we only need … [gets out his calculator] … let’s see … carry the one … about, oh, a lot of years of months exactly like September until we’re finally renewable-only.